Our mistress hired a room for my crippled sister Nelly , and she gave her knitting and needlework when she was able to do it, and when she was ill *she* sent her dinners and many nice comfortable things and was like a mother to her.

Are "she" and "mistress" the same thing in the aforementioned sentence (choose from options)?

Available choices:
[A]. no
[B]. yes
[B].